Unfortunately, literature sources on Operation Bagration are scarse. Everything I know about that operation is from Anglosaxon sources and partially from German articles published in Spiegel magazine quite long time ago. It appears that Operation Bagration is not Russian plagiarism of the German Kessesschlacht. I am deliberately using that German word instead of unclear concept of Blitzkrieg because Kesselschlacht is much more adequate. Interestingly, Hitler himself didn't like that term either, for good reasons, I guess. Operation Bagration was rather double Deep operation, a variant of strategy developed by Tukhachevsky. There was no intention to converge two spearheads like Germans preferred to do in order to create a Kessel (ang: cauldron). The idea behind Bagration was to penetrate deep behind the enemy lines and to destroy the enemy's rear and logistics. In fact Russians have constantly advanced until they have dangerously overstretched their own supply lines and then stalled. According to Rokossowski's memoirs, Stalin insisted on a single line of advance, but Rokossowsky convinced Stavka to approve his original plan with two axes of advance.